Monorail-trolley-truck construction.



G. A. TRUE.

MoNoRAIL TROLLEY TRUCK CONSTRUCTION.

APPLICATION FILED JAN.19. 1912.

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UNITED -STATE..wS ILXLIENT OFFICE.

GEORGE A. TRUE, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO NORTHERN ENGINEERING WORKS, OF DETROIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

MONORAIL-TROLLEY-TRUCK CONSTRUCTION.

Specification of Letters Patent.

Application filed January 19, 1912.

Patented Aug. 20, 1912.

Serial No. 672,205.

To all whom it may concern Be it known that I, GEORGE A. TRUE, a citizen of the UnitedStates of America, residing at Detroit, in the county of Vayne 5 and State of Michigan, have invented certain new and useful Improvements in Monorail-Trolley-Truck Construction, of which the following is a specification, reference be* ing had therein to the accompanying drawings.

The invention relates to mono-rail trolley constructions and the invention consists in various features of construction as hereinafter set forth.

In the drawings,-Figure 1 is a perspective View of one of the trolleys and a portion of the truck frame; Fig. 2 is a cross section thereof.

In the construction of overhead trolleys 0l it is usual to arrange wheels upo-n opposite sides of the L-beam or other track member which are engaged by a bifurcated frame or hanger for supporting the carriage. In case of the breaking of either of these wheels or its axle there is nothing to prevent the disengagement of the hanger and dropping of the load. Thus it sometimes happens that the pounding of the wheels in bridging gaps between adjacent rails or in crossing any other irregularity in the track will result in the crystallization of the metal and eventually in the breaking of the wheel or axle with disastrous results. Another accident that sometimes occurs is the disconnection and dropping of the carriage from the hanger due to the disengagement of the king bolt which forms the pivotal connection therebetween.

It is the object of the invention to overcome these difficulties which is accomplished rst, by the peculiar construction of the hanger which is provided with guards for engaging with the rail to prevent dropping of the load where the wheel or axle is broken; second, in the peculiar construction of means for securing the king bolt to prevent accidental disengagement of the carriage from the hanger.

In detail A is a section of an overhead 0 trolley track, B is a bifurcated hanger or through the medium of a king bolt F engaging a block or member Gr arranged between parallel beams I-I and H of the carriage frame.

To guard against accidental disengagement of the hanger, the bifurcated frame B is provided with extensions I on opposite sides and on opposite ends thereof, which extensions pass around the wheels and inward into proximity to the web of the track beam. The lower flanges J of these extensions are separated but a slight distance from the flanges D and D of the track so that the failure of any one of the wheels or its axle will result merely in the slight dropping of the frame to rest the flange J upon the track.

To guard against disengagement of the carriage frame from the hanger I have provided a strap member K which is bolted or otherwise secured to the opposite sides of the hanger B and passes downward and beneath the block G. The lower portion of the strap has a recess L therein adapted to receive the head of the king bolt and preventing the same from turning. Thus the unscrewing of the nut from the king bolt is prevented and in case of the breaking of the bolt the load would still be sustained by the engagement of the .strap with the block G.

What I claim as my invention is:

1. In an overhead trolley truck, the combination with a bifurcated truck frame or hanger for embracing the truck beam, of truck wheels journaled upon said frame and engaging the track., and a guard projecting inward from said frame and overhanging the track, said guard being adapted to sustain the load upon failure of the wheel and.

being arranged in immediate proximity to the track so that upon failure of the wheel but a slight dropping of the frame will be permitted.

2. In an overhead trolley truck construction, the combination of a bifurcated trolley frame or hanger, pairs of wheels on opposite sides of said frame for engaging the opposite flanges of the track, and lateral extensions of said frame passing around said wheels and inward toward the web of the king bolt for sustaining the load upon failure or disengagement of said king bolt.

4. The combination with an overhead trolley truck, of a oarriageframe suspended therefrom, a king bolt for attaching said frame to said truck, a block or cross mem-` ber on said carriage frame with which said king bolt is engaged, and a strap embracing said trolley truck passing beneath said block and adapted to sustain the load.

5. The combination with an overhead trolley truck, of a carriage frame suspended therefrom, a king bolt for 'Connecting said truck to said frame, a block or cross member on said frame with which said king bolt is engaged and below which the lower head of the king bolt is arranged. and a strap embracing said truck passing beneath said block and having a recess for receiving the head of said bolt to prevent turning thereof.

6. rlhe combination with an overhead trolley truck, of a carriage frame suspended therefrom, a king bolt for attaching said frame to said truck, a block or cross member on said carriage frame with which said king bolt is engaged, and means associated with said block for sustaining the load upon failure or disengagement of said king bolt.

ln testimony whereof ath); my signature .in presence of two witnesses.

GEORGE A. TRUE. Witnesses:

7. G. CHEsEBoRoUGH, Louis H. OLrs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). C. 

